Sealing Stone Outside.

Limestone, Sandstone, Travertine, Marble, Slate, Granite, concrete:
Regardless of what type of flooring you choose, the likelihood is it will require some form of sealing.

This is because natural stone is porous, and therefore if left unsealed, any moisture will be soaked up by the stone making it very difficult to remove, and potentially leaving the surface permanently stained (sometimes even fallen leaves can cause stains).

The best way to prevent all this is to seal the stone.

When you seal a stone, you are essentially filling any voids or pores of the stone with the sealer. This prevents any further liquid to absorb in to the tile, as demonstrated here with this close up shot of a water droplet on a tile sealed with LTP Mattstone.

When sealing natural stone outside it is important to use a breathable impregnating sealer, this will allow the transition of moisture from underneath.
Examples include LTP Mattstone H20 & LTP External Stone Sealer both are water based breathable sealers and ideal for use outside.

It is important to note that all stones located outdoors are susceptible to a condition known as efflorescence.
This blooming is caused by water moving through the substrate of a material and carrying minerals and salts found in the mortar bed, grout, soil or the stone itself.
We have a blog here all about efflorescence.

Its also very important when laying Natural stone to make sure that its fixed on a full bed of adhesive and not spot fixed.
The end result could look like this if its spot fixed.
Spot fixing issue Sandstone

If this has already happened to your patio, we have a blog here.

When sealing different natural stones, what will vary the most will be how many coats the stone will need before it is fully sealed.
Each stone exhibits different levels of porosity. A tumbled Limestone may have a higher porosity level than a Honed and filled Limestone.

Sealing natural stone with Mattstone H20

Shake bottle before use.

Test the porosity of your stone with water and a teaspoon, using the LTP porosity test.

Once surfaces are clean and dry, apply the product to the surface evenly using a sealant applicator pad, brush or soft cloth.

When sealing its important not to over apply the sealer and redistribute excess, avoid letting the sealer pool on the surface, as this can cause white marks to appear on the stone when it dries.
On highly absorbent surfaces apply several coats wet-in-wet.
After 15 minutes, remove any excess sealer with an absorbent cloth. Do not allow residues to dry on the surface.
Do not walk on the surface for 3 hours.

Sealing natural stone with External stone sealer.
Apply evenly to the surface using a foam roller or paint brush. On more absorbent surfaces apply further coats at hourly intervals until the surface is completely saturated. Remove any residual sealer if still visible after one hour.

Cleaning Tiles Outside

Before you start sealing your stone it is important to make sure your stone is clean and dry, other wise you will just seal in dirt and grime.

Old layers of sealer, dirt residues and light deposits of organic matter and algae must be removed from the surface and pores of the stone.

This can be done by either using LTP Grimex which is a intensive cleaner or LTP Mouldex Paving Cleaner.

To Clean with LTP Grimex, dilute 1:3 with water, apply to the surface with a sponge or water brush and leave to sit on the surface of the tiles for as long as it takes for the dirt to release. (5-30 minutes depending upon the level of dirt). If areas look as if they are drying out just add a little more solution to keep the area wet.

Agitate the surface with a stiff deck brush after approx 10 minutes (scrubber machines can be used).

Continue to scrub while adding clean water. Remove residues from the surface with water or scrubber machine.

Rinse thoroughly with clean fresh water to remove all remaining residues. Use a power washer if necessary.

Allow the surface at least 24 hours to dry before sealing.

To clean with LTP Mouldex Paving Cleaner, Shake well before use.
Surfaces to be treated should be completely dry before application.
Pour solution undiluted directly onto the pavers and spread out evenly using a sponge or paint brush, Garden sprayers can also be used and leave for a minimum of 1 hour.

Apply a little water and agitate with a stiff Deck brush or emulsifying pad to release the dirt and grime, and then rinse thoroughly using a hose or jet wash.
Some stubborn stains and black spot may require a longer treatment, in which case apply and leave on surfaces overnight. If some black spot remains after treatment, It should fade and disappear after a few days following the treatment. If not: re-apply. Keep pets off at all times during treatment. In case of contact with metals, fabrics and painted surfaces rinse with water immediately. Do not use on warm surfaces. Do not apply if rain is imminent. Avoid contact with ponds & plant life: if contact is made rinse well with plenty of water.

General Maintenance.
Weekly or daily depending on conditions, use a hose and a brush to remove any debris that may be lying on the stone.
Then annually if required use LTP Grimex, this will remove surface dirt and grime, possibly every 6-12 months depending on condition.
Dilute Grimex 1:3 parts water and apply the solution on to the surface and agitate.
Leave for 10 minutes before agitating again and then rinse with water.
Allow 24 hours to dry and then if necessary re-apply a light coat of sealer.

PLEASE NOTE: Always follow the detailed instructions on the product labels. Protect stone surfaces from contact with acidic substances. Do not use abrasive materials on honed or polished stones. Avoid using normal detergents or strong bleach cleaners on sealed surfaces as they will gradually remove the protective seal.

Please note that this information is offered as general guidance only and without guarantee. Your specific circumstances may need an alternative approach. In case of doubt, any process should be tried out in an inconspicuous area before general application.

 

How do I clean my external paving?

Featured

Patio’s can give that refined and uniform look to a garden area, a clean cut from grass to stone, and when newly laid they look fantastic.

olive-limestone

If you had them laid before the winter months however they probably won’t look the same now as they once did. With the amount of rain that we have had over the last few months, the probability is that you will have some form of green growth on the tiles.

This green growth is a mix of Algae, moss and lichen which builds up on the tiles, normally more common in areas of higher rainfall, as this is the perfect place for algae to grow, high rainfall and with areas for the algae to cling to.

However this isn’t the end of your patio, as this can be easily fixed with the correct tools.

Cleaning Patios With LTP Mouldex

Firstly you will want to brush the stone with a stiff bristle deck brush to remove any leaves, dirt or debris from the surface of the stone.

Making sure the area is now free of loose debris, pour LTP Mouldex direct on to the stone and spread out over the area with a brush or sponge. (Garden sprayers can be used)

Black limestone with LTP mouldex applied on it with a sponge.

Leave for a minimum of one hour, then add a little water and agitate with a emulsifying pad or stiff deck brush to help loosen algae, dirt and grime.

After a minimum of 1 hour, agitate with emulsifying pad.

After a minimum of 1 hour, agitate with emulsifying pad.

Rinse thoroughly with water. Garden hoses and jet washes can be used. Be careful though as jet washes force water at the surface at high pressures and can cause damage to some stones.
Some stubborn stains and black spot will require longer treatment, in which case apply and leave overnight.

Rinse well with plenty of water

Rinse well with plenty of water

Once fully dry, (normally 24 hours) we recommend sealing with LTP Mattstone H20, this will prevent moisture and organic molecules from absorbing into the surface.

Black Limestone once cleaned and sealed

Black Limestone once cleaned and sealed

LTP Mouldex is a highly effective HSE registered product which has been developed to Help restore natural stone and paving to its original colour.

Grey Limestone with LTP moudlex.

Grey Limestone with LTP moudlex.

KILLS & REMOVES:

  • Algae
  • Black Spot
  • Mildew
  • Mould
  • Lichen
  • Fungus
  • Pollution
  • Pollen stains

Anti-bacterial action helps prevent re-growth.

Suitable for use on all external stones and concrete paving.

Simple to use….apply and leave….scrub and rinse.

The fast acting formula will restore external paving and help prevent re growth.

Protecting stone surfaces after treatment with LTP Mattstone H20 will further reduce the possibility of black spot and mould spores from returning. It will also help prevent deep staining from falling organic matter and make any future cleaning much easier.

Grey Limestone After cleaning and sealing.

Grey Limestone After cleaning and sealing.

One 5ltr can will treat up to 50 sq.m deepending upon the extent of soiling.

LTP Mouldex 5ltr only £39.54 Inc VAT.  (click here to buy or find your nearest stockist)

2_73_e

For further information on the application of LTP Mouldex watch the video below.

Please note that this information is offered as general guidance only and without guarantee. Your specific circumstances may need an alternative approach. In case of doubt, any process should be tried out in an inconspicuous area before general application.

Encaustic Tiles

Encaustic tile

Encaustic tiles are made of two or more colours of clay that are then mixed or inlaid together to create a pattern, they are then fired.
Encaustic effect Cement tiles are created by pouring different colour mineral pigments into a mold, grey cement then fills the rest of the body of the tile, this gets hydraulically compressed and left to set or cure for 3 weeks.
Both tiles are unglazed and would require sealing.
For more information please follow this link.

Prior to sealing it is always advisable to clean the tiles thoroughly with a solution of LTP Grimex. This advice goes for both newly laid and renovation projects. Remember not to use acid based cleaner with encaustic tiles .

When it comes to sealing there are various options available depending on the desired look of the floor, however the most popular are the natural Matt finish using either LTP Mattstone or the water based equivalent LTP Mattstone H20. Depending on the type of encaustic tile being used, up to three or four light coats of sealer might be required. Always test on an inconspicuous area first and buff off any excess.

LTP Colour Intensifier is also popular as its use offers a delicate enhancement of the different coloured patterns within the encaustic tile.

Finally, as always, the use of a compatible aftercare product in this case LTP Waxwash, will ensure optimum longevity for the sealed surface as standard household Encaustic 2 pg guidescleaners may compromise the effectiveness of the seal over time.

Correctly sealed and maintained an encaustic floor should last three to four years before re sealing is required.

To download an information sheet, Please follow the link below.

Encaustic Tiles guide

 

This information is offered without guarantee . The material should be used so as to take into account of the local conditions and the surfaces to be treated. In case of doubt, the products should be tried out in an inconspicuous area before general application.

PROBLEMS WITH STEAM CLEANING LIMESTONE

The simplicity of water-based steam cleaning can be appealing, but repeated use of too much super heated water can lead to risks of residual staining, mobilisation of salts and corrosion of hidden particles of Iron within some limestone surfaces.

 

Mud vein in limestone magnified 120 Microns

Surface of a Limestone magnified by 120 microns

Steam can penetrate the small cracks and fissures on the surface of the limestone.
This does clean the limestone, but will also embed water into the surface.
Repeated cleaning using a steam cleaner can activate salts and weaken the stone over time. This can also lead to spalling or fragmentation of the surface.

Cleaning to expose new fissuresCOMPROMISED SEALER?
Surfaces that have been treated with an impregnating sealers can also be compromised. Steam cleaning does not normally remove the impregnating sealer, however repeated use can expose new fissures and capillaries within the stone. The newly exposed and unsealed surface takes in more dirt and becomes harder to clean, which then requires more frequent cleaning. This increase in cleaning can exacerbate the problem.

 

SURFACE SEALER DAMAGE?Damage to stone surface

Sealers used to finish the surface of stone can also be damaged. Steam is often used to remove paints, wall papers and other
coatings from surfaces. If a film forming
sealer has been used then contact by a
steam cleaner can cause a partial separation of the seal from the surface of the stone causing it to turn white or opaque.

 

                                                                        Rust stains in Limestone after spalling
RUST STAINS ON THE SURFACE?                                  
Rust stains:  These stains are reddish-orange and are caused by the oxidation (rusting) of iron. The source of iron staining is normally from within the stone, as most of the iron on the surface is normally
removed or discarded at the point of fabrication by the quarry. Therefore most Iron remains hidden and within the stone rather than on it; however, water from steam cleaning penetrating through natural fissures in the  stone can activate or accelerate rusting.
CRUMBLING OF THE SURFACE?
Moisture from repeated steam cleaning can in someSpalling Limestone
cases cause spalling or fragmentation of the surface.
The migration of salts from moisture in the limestone can promote crumbling of the surface causing larger fissures and craters to appear. This is more
common in Limestone’s and marbles that contain naturally occurring mud or calcite veins which are more vulnerable to this issue.

 

WHAT TO DO?

COMPROMISED SEALER: Intensively clean the surface of the stone with LTP Grimex. Leave overnight to dry. Re-apply impregnating sealer – LTP Mattstone or LTP Colour Intensifier. For routine aftercare use LTP Waxwash. This is a PH neutral cleaner that will not damage the stone or compromise the seal.

SURFACE SEALER DAMAGE: Remove the Film forming sealer using LTP Grimex or LTP Solvex. Leave overnight to dry. Re-apply the film forming sealer – LTP Ironwax Satin or LTP Ironwax Gloss. For routine aftercare use LTP Floorshine. This gentle cleaner will clean the surface and repair the seal where it has worn from abraision every time the floor is washed.

RUST STAINS ON THE SURFACE: Intensively clean the surface of the stone with LTP Power Stripper. Leave overnight to dry.Re-apply impregnating sealer – LTP Mattstone or LTP Colour Intensifier. For routine aftercare use LTP Waxwash. This is a PH neutral cleaner that will not damage the stone or compromise the seal.

CRUMBLING OF THE SURFACE: Intensively clean the surface of the stone with LTP Grimex. Leave overnight to dry. Use a suitable resin stone filler of the correct colour to fill in the voids. Re- hone the surface of the stone using a twister pad and sponge down with a little water to remove any dust or sediment. Leave to dry. Re-apply impregnating sealer – LTP Mattstone or LTP Colour Intensifier. For routine aftercare use LTP Waxwash. This is a PH neutral cleaner that will not damage the stone or compromise the seal.

This information is offered without guarantee.  The material should be used so as to take account of the local conditions and the surfaces to be treated.  In case of doubt, the product should be tried out in an inconspicuous area.

Natural Stone and Tiles – Common Stains: Water

How to remove Water Stains ­from Natural Stone and Tiles

A water stain mark on natural stone

Natural stone and tiles are an investment that can add real quality to your home or office environment. When staining or marking of a stone surface on a kitchen, bathroom or office floor or work surface occurs, such as water stains; this can create a potentially difficult situation to resolve.

Understand your surface

Ensuring that you know what has caused stains on stone, the material stained and whether the surface is protected can all have a bearing on how you should address the issue. If you are in any doubt it is often more straightforward to seek expert assistance. At LTP we offer FREE technical assistance via our Helpline +44 ( 0) 1823 666213. In most cases, it will be easier to assist you if you are able to supply photographs of the issue and surface. Please send images to info@ltp-online.co.uk with as much information as possible.

Is your stone surface protected?

Natural stone protected with LTP Mattstone

Knowing if your stone surface or tiles has a protective seal applied is important in understanding the best solution to address the issue. Often when a protective seal is in place the method for tackling the problem is much less aggressive and simpler. Essentially this is because the stain is most often only affecting the protective seal.

To protect natural stone and tile surfaces to help prevent staining LTP recommends for following sealing products.  LTP Mattstone or LTP Mattstone H20 for a natural (invisible finish) or LTP Colour Intensifier & Stainblock for an enhanced appearance. LTP Colour Intensifier & Stainblock deepens the colour and enhances the appearance of the stone surface.

Common stains on natural stone and tiles – Water Stains

Water stains can appear on natural stone and tile surfaces such as floors and worktops when water is left to stand, as it dries into the surface it can cause a stain. This is most common with porous stone surfaces such as limestone, flagstones, sandstone and terracotta, but water stains can also affect glazed ceramics, porcelain and polished surfaces such as porcelain, granite and marble.

THE MOST COMMON CAUSES OF WATER STAINS ARE OUTLINED BELOW…

Using the wrong maintenance cleaner can gradually affect the performance of the seal. This after a while allows water to penetrate beyond the seal. In areas of hard water, these water droplets can dry out to leave a lime deposit on the surface. Hard water stains are difficult to remove using normal detergents.

Repeated cleaning of stone surfaces using water and a mild detergent can create a film on the surface.  When we mop and clean our surfaces the water dries off to leave a very slight film of residual detergent. In the months that follow this can create a micron thick film across the surface.  Water droplets can dilute the detergent in the area that they sit on leaving a spot mark.  This all happens on a fairly microscopic level, which is why staining of this nature is sometimes only visible when looking across a surface towards a light source.

The LTP approach to removing water stains

The method that LTP recommends for tackling water stains differs depending upon the surface type.

LIMESTONE, MARBLE, TRAVERTINE AND OTHER ACID SENSITIVE SURFACES

For acid sensitive surfaces, we recommend using LTP Grimex or LTP Power Stripper. Simply wash the area as directed by the label instructions, rinse and allow to dry. Note that if the surface has a protective seal the surface may need re sealing. To make sure that you achieve a uniform finish a wider area may need treatment.

PORCELAIN, TERRACOTTA, SANDSTONE AND OTHER NON ACID SENSITIVE SURFACES

For surfaces that are not acid sensitive, we recommend using LTP Grout Stain Remover. Treat the affected area as directed by the product label, rinse and allow to dry. In some cases you can simply buff the surface to its original shine. Where this is not effective and to help maintenance you may consider applying LTP Glaze Protector.

If the stain persists repeat the treatment, if this is unsuccessful please contact our FREE helpline.

PLEASE NOTE: Always follow the detailed instructions on the product labels. Protect stone surfaces from contact with acidic substances. Do not use abrasive materials on honed or polished stones. Avoid using normal detergents or strong bleach cleaners on sealed surfaces as they will gradually remove the protective seal.

At LTP we believe in helping to offer solutions and this is why we offer a no obligation
LTP TECHNICAL HELPLINE, so please give us a call on +44 (0) 1823 666213 or email info@ltp-online.co.uk and we will be happy to help you.

Visit www.ltp-online.co.uk to buy or find out more about our range of products.

LTP cleaning of natural stone

Cleaning tips for natural stone wall and floor tiles

When is intensive stone or deep cleaning required?

  • As an important stage in the installation process of wall and floor tiles.
  • Where poorly maintained natural stone floor tiles need a top up seal.
  • When restoring natural stone wall or floor tiles.
  • For routine cleaning of unsealed external patios and paved areas.

Why would newly installed wall or floor tiles require intensive cleaning?

Keeping natural stone wall and floor tiles scrupulously clean before and during the fixing process, is vitally important. Intensive cleaning of stone floors and walls before application of the correct protective sealing product will make sure the result does not disappoint. Installing stone flooring and worktops by nature creates grit, dirt and adhesive residues. Ensuring that a vacuum is used (being careful not to scratch the surface) to remove loose dirt from your new stone floor or worktop will not address stains and residue marks. Simply washing stone flooring in water will not be effective in removing ingrained marks or adhesive. Using standard household cleaning products that often contain bleach is likely to damage the surface of your newly installed natural stone floor or wall. You should make sure that the correct cleaning product is used for the natural stone material being installed. Need more information about surfaces? Visit our identify your surface selector.

Selecting the correct intensive cleaning product for your natural stone flooring or wall tiles

LTP has developed a range of four intensive cleaning products that offer intensive cleaning solutions for most commercial and domestic applications. Each of our intensive cleaning products has been designed to address the needs of specific circumstances related to artificial and natural stone. We have solutions for all types of natural and artificial stone flooring, granite countertops and fireplace surrounds. Ensuring you have the correct product for the task by simply contacting our Technical Helpline on +44 (0) 1823 666213.

Removing grout stains1. LTP Grout Stain Remover (1&5 litre containers)

An intensive cleaning solution for removal of cement and grout residues from stone flooring and wall tiles. Extremely effective against mineral salt formations (efflorescence) and the removal of plaster and dust stains. Useful for routine cleaning of unsealed patios and other outside paved areas. LTP Grout Stain Remover may be used on glazed ceramics, quarry tiles, terracotta and some stone. (Do not use on limestone, marble or other acid sensitive surfaces.) Buy LTP Grout Stain Remover

 

 

Cleaning grime from natural stone2. LTP GRIMEX (1&5 litre containers)

The answer to stubborn grime, oil, old layers of wax or acrylic and even rubber sole marks on terracotta and natural stone flooring. Ideal for removing ingrained dirt and grime, both internally and externally. Suitable for use on glazed and unglazed tiles this product is excellent for renovating old quarry tiles, terracotta, slate, stone, marble, stone fireplaces and can be used to clean brick and external paving.
Buy LTP Grimex >>

 

 

Removing oxidised linseed oil3. LTP POWER STRIPPER (1&5 litre containers)

For removing existing layers of sealer from tiles. One of the few intensive cleaning products on the market capable of breaking down oxidised boiled linseed oil and beeswax from the surface of terracotta. Powerful amines, ammonia and alkalinity penetrate and help lift the hardest, heaviest films. Ideal for intensive cleaning of heavily contaminated vitrified quarry tiles, limestone, travertine, sandstone, slate, glazed ceramics and porcelain. Strips most things first time thereby minimising labour costs. Buy LTP Power Stripper >>

Removing tick layers of sealant4. LTP SOLVEX (1&5 litre cans)

A powerful non-caustic stripper that softens most types of solvent based surface sealer, which can then be removed with ease. Suitable for removing most wax, oil, emulsion and polyurethane sealers. Will not discolour or damage natural stone, slate, terracotta or quarry tile surfaces. After washing and rinsing, surfaces are ideal for re-sealing. Buy LTP Solvex >>

How to remove staining from Black Limestone before sealing.

Visible stains on Black Limetone

Visible stains on Black Limetone

After quarrying, milling and then packing a black limestone it is possible for residues of moisture and sediment to remain on the surface. If left over a period of months these deposits of mineral and sediment absorb into the pores of the stone. This type of staining can be very difficult to remove using conventional cleaning materials. The following is a guide to help restore the                                                                                     appearance of the stone using a strong                                                                                   cleaner and then sealing to restore and                                                                                   enhance the colour.

DIRECTIONS FOR CLEANING AND SEALING

1. LTP Grout Stain Remover is applied and 2. GSR scrub immediatelythen immediately scrubbed into the surface using a black emulsifying pad. This should be done for 1 – 2 minutes making sure to cover the whole surface of the stone. This cleaner will slightly etch the surface of the stone to release the stains from within.

 

3. Rinse well with plenty of water2. Do not leave the cleaner to dwell on the surface. Rinse with water immediately after scrubbing. Change the rinsing water every 5 M².
After cleaning leave surfaces to dry for 24 hours.

 

4. Leave to dry
3. Once dry, surfaces will appear grey rather than black. The stains should no longer be visible. The surface of the stone has been conditioned ready for sealing.

 

5. Apply Stoneoil4. Apply a small amount of LTP Stone Oil to the surface of the Limestone and spread out evenly. Leave to absorb into the surface of the stone for 1 hour. Any visible excess after this time work should be worked off using a soft absorbent towel.

6. Spread out evenly

5. The sealer should be left to dry for a minimum of 24 hours with light traffic only.
It will take a further 3 days to reach full hardness, so surfaces should be kept as dry as possible during this time.

INTERIORS
Finishing the stone with a light coat of LTP Mattstone should be considered if the stone is to be used in kitchen areas.

INITIAL CLEANING:                LTP GROUT STAIN REMOVER                   1ltr & 5ltr

This should be done after fixing and before sealing LTP-GroutStainRemover5L&1L_2011_Weband grouting to remove calcium carbonate and mineral deposits including dust and dirt that has accumulated during the production and fixing process. Apply undiluted solution to the surface of the stone and agitate immediately with an emulsifying pad. Rinse thoroughly with a separate pot of clean fresh water. Wipe away the released calcium dirt and grime with a mop or sponge and water and leave to dry for 24 hrs.

TDS – http://www.ltp-online.co.uk/images/tds-Grout_Stain_Remover.pdf

MSDS – http://www.ltp-online.co.uk/images/msds-Grout_stain_remover_clp_GHS.pdf

SEALING:                                      LTP STONEOIL                                        1ltr & 5ltr

Before grouting apply a light coat of LTP Stone Oil, LTP-StoneOil5LTin_1L_Grp_Webcheck that all of the sealer has been
fully absorbed within 1 hour, any excess that remains on the surface after 1 hour should be worked in with a soft cloth or buffing machine. Leave for a further 4 hours or overnight before grouting the joints. Once all residual grout has been removed and the surface and joints are thoroughly dry; apply a final light coat of StoneOil covering the joints as well. Buff to remove any excess within 1 hour and then leave for a minimum of 3 days to fully harden before making excessively wet.

TDS – http://www.ltp-online.co.uk/images/tds-Stone_Oil.pdf
MSDS – http://www.ltp-online.co.uk/images/msds-Stone_oil_clp_GHS.pdf

IMPORTANT NOTES:
When cleaning or sealing vertical surfaces always start at the top and work down.
Provided that the surfaces are correctly sealed and maintained protection should last 3 – 4 years before considering applying a top up coat. Sealing will not prevent wear from abrasion.Used externally sealers will last between 1 & 2 Years before light cleaning and topping up.
After Intensive cleaning to remove any ingrained dirt or other staining and once dry, always test for moisture ingress. If evident cleaned areas should be re-sealed.
When using LTP Grout Stain Remover, gloves should be worn.
For detailed application instructions please see Technical Data Sheets.
This information is offered without guarantee. The material should be used so as to take account of the local conditions and the surfaces to be treated. In case of doubt, the product should be tried out in an inconspicuous area

How To Remove Orange/Pink Stains From The Edges Of Natural Limestone

Tanin and mould stains on Limestone copy

 

DEEP CLEAN UN-SEALED SURFACES TO REMOVE STAINS BEFORE SEALING

 

Limestone tiles are saturated with moisture during fabrication and packed into wooden crates for transport.  They are tightly packed so any retained moisture within the stone can remain for many weeks after packing. Moisture in the stone absorbs into the timber of the crate, which after a while causes tannins from the timber to become drawn into the edge of the stone, where it dries to leave an orange pink deposit. Retained moisture can also encourage the growth of mould spores which also contribute towards the staining affect.

PICTURE 1: SHOWS ORANGE STAINING FROM ALONG THE EDGE OF A PIECE OF WHITE LIMESTONE

Before copy

PICTURE 2: SHOWS APPLICATION OF MOULDEX TO THE EDGE AND SURFACE OF THE STONE

Mouldex application copy

PICTURE 3: SHOWS THE RESULT, PINK & MOULD STAINS HAVE BEEN REMOVED & THE STONE IS CLEAN

After copyBefore, during & After close up copy

STAIN REMOVAL:                         LTP MOULDEX                                                 500ML

Spray Mouldex to the edges and surface of the stone and spread out evenly making sure to cover the whole stone and not just the areas affected by staining. Leave on the surface for 2 – 3 hours. Agitate using a soft (white) emulsifying pad until the solution foams up and rinse well using plenty of water and a sponge. Change rinsing water after every 5 M². Surfaces should be left for a minimum of 24 hrs before sealing.

TDS – http://www.ltp-online.co.uk/images/tds-Mouldex.pdf

 

SEALING:                                        LTP MATTSTONE                                500ML,1&5ltr

Apply LTP Mattstone Sealer evenly to the surface of the stone using a sealant applicator pad. The impregnating sealer should be left for 45 minutes to absorb. Buff well using a soft cloth or machine with white pad to work off any visible excess.  Apply further coats at two hourly intervals using the same method. The object is to fully saturate the marble and terrazzo with sealer without allowing any excess to dry on the surface. The marble will be more absorbent than the terrazzo. Leave for a minimum of 24 hours before allowing traffic.  Treated surfaces will take about 3 days to become fully resistant. So light traffic only and do not wash.

TDS – http://www.ltp-online.co.uk/images/tds-Mattstone.pdf

IMPORTANT NOTES:
For really stubborn stains the stain removal process may need to be repeated.
Provided the surfaces are correctly sealed and maintained protection should last 4 – 5 years before considering applying a top up coat. Sealing will not prevent wear from abrasion. Stone surfaces laid in heavily trafficked areas should be tested for moisture ingress every 12 – 18 months. If moisture absorbs apply more sealer.
After Intensive cleaning to remove any ingrained dirt or other staining and once dry, always test for moisture ingress. If evident cleaned areas should be re-sealed. Maintain sealed surfaces with PH Neutral cleaner LTP Waxwash.
For detailed application instructions please see Technical Data Sheets.
This information is offered without guarantee.  The material should be used so as to take account of the local conditions and the surfaces to be treated.  In case of doubt, the product should be tried out in an inconspicuous area

Marble Floor Loosing its Polished Sheen?

Why do Polished Marble Floors lose their Sheen?

This issue is not un-common, we get hundreds of calls every year about the use of polished marble in heavily trafficked areas.
English: Jefferson County Court House, Beaumon...

Using Marble for Floors

When considering a natural stone polished marble as a floor covering there are several factors to take into consideration, the two most common are location and ease of maintenance.

The effect of foot traffic on a marble floor

Polished marble used in heavily trafficked areas will always be subject to wear from abrasion. This is more common for natural stone marble floors in kitchens and halls. Foot traffic is abrasive and it wears down the polished surface of the marble floor creating dull patches. Signs of this can sometimes appear on natural stone marble floors within six months of installation. Sealing the marble floor can offer a little mechanical strength to extend the wear ability, but it will not prevent it from happening.

LTP MPG Sealer is our recommended product for protecting polished marble floors.

Correct maintenance of marble floors is vital

Using the correct maintenance products on marble floors can help to extend the life of the polished surface as they do not compromise the seal or damage the surface of the marble. If an inappropriate cleaning solution is repeatedly used it can damage natural stone weakening the surface. In the case of polished marble it can cause it to degrade and then show signs of wear sooner than expected.

LTP Waxwash is our recommended product for maintaining polished marble floors sealed with LTP MPG Sealer.

Restoring the sheen on marble surfaces

There are chemical solutions available to restore the sheen to a marble, however they tend to be for repairing small spot marks from acid spillage rather than whole floors. The best solution for restoring the polish on a marble floor is a mechanical one. The surface of the marble floor should be re-burnished using diamond pads followed by correct sealing and then an appropriate maintenance regime. This process is normally repeated every 12-18 months to help maintain the sheen.

When we see marble floors at airports and in hotel reception areas, machines are used repeatedly to clean and re-burnish the marble surface, this is how they manage to stay in good condition. This is not always so practical in a domestic situation.

An alternative finish for marble

If this all seems too much for you it might be worth considering a honed finish instead of a highly polished for your marble floor. as it will be more forgiving and will not need the repeated re-burnishing and re-sealing. A honed finish can be achieved using lower grit diamond pads and the same mechanical polishing process.

For a honed marble floor LTP recommends sealing with LTP Mattstone or LTP Mattstone H20 (Eco friendly selaer) and maintaining with LTP Waxwash.

Should you use a professional floor restoration company?

The application techniques described above are achievable by a competent DIY enthusiast using the products as described. However, natural stone is often expensive and each stone has its own natural characteristics. We often find that many of our customers prefer to use the experience and skills of a professional stone restoration and cleaning company to make sure that their project finished to the highest standard.

LTP is pleased to be associated with the following companies that specialise in natural stone restoration and cleaning:

At LTP we believe in helping to offer solutions and this is why we offer a no obligation
LTP TECHNICAL HELPLINE, so please give us a call on +44 (0) 1823 666213 or email info@ltp-online.co.uk and we will be happy to help you.

Visit www.ltp-online.co.uk to buy or find out more about our range of products.

Renovating natural stone floors and wall tiles

Renovating tiled floorsWhen is renovating stone floors and walls the solution?

Renovating floors and walls is a task that is difficult to avoid if you own a natural stone surface for a long period. Over time natural and artificial stone walls and floor tiles can become ingrained with dirt, grime and stains of all types. Use of the correct protective sealer and regular use of an appropriate routine maintenance product will minimise the speed at which this takes place. However over time and where exposed to extreme levels of traffic, stone flooring in particular, can become dull, dirty and worn looking, even after a routine cleaning. When this happens renovating stone floors or walls by removing tile sealers and re sealing the surface, can be the most effective approach.

If natural stone surfaces have not been sealed properly then dirt and grime can very quickly become ingrained in the surface. If stains such as coffee, red wine, grease and fat are left on the surface for long periods these can prove very difficult to remove from the surface of stone. It is important to remember that even if your natural stone has been protected by a sealing product. This will make the surface stain and water-resistant not bullet proof. Moped up spills immediately to avoid liquids such as red wine, that contain acid etching through the surface.

Again in this situation renovation of stone floors and walls maybe the only effective solution.

Remove excess sealer from stone flooring and walls

Renovating natural stone floors and wall tiles can also be required in order to remove excess sealer due to over application when installing a new stone floor. The application process of a tile sealer to a newly installed floor should include steps to any remove excess sealer before it dries. Failure to address this step will often lead to unsightly discolouration of the surface. Often this does not need the surface seal be fully removed. Please contact our Technical Helpline for help on how to remove excess sealer? When removing tile sealers we highly recommend that you select an effective commercial intensive cleaning product to suit your natural stone floor or wall.

Removing Boiled Linseed Oil

Another common renovation situation is the removal of boiled linseed oil. Boiled linseed oil oxidises over time and provides a fantastic seal to the tiles. But during the oxidisation process the boiled linseed oil often changes colour and becomes a brown tinge or sometimes an orangey hue when too highly diluted with spirit. The result is a dirty looking shadow over your floor especially where the oil had penetrated really deeply. Removing boiled linseed oil can prove to be particularly challenging so we would recommend that you contact our Technical Helpline for free advice and help when dealing with boiled linseed oil.

Selecting the correct approach to renovating a stone surface

The method of renovating stone wall or floor surfaces and removing tile sealers will depend upon the type of surface material and the protective sealing product originally used to protect the surface. Offering general advice without understanding specific circumstances is often difficult although we have outlined some common circumstances below.

If you are uncertain about the type or make of sealing product used to originally protect your surface please contact our Technical Helpline on +44 (0) 1823 666213 or email us at info@ltp-online.co.uk

Common renovation situations

Renovating floor tiles sealed with Boiled Linseed Oil or Beeswax

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Step 1: Use LTP Power Stripper when removing boiled linseed oil or wax from floor tiles.
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Step 2: Apply one coat of LTP Stone Oil, following instructions on the container.
  • Step 3: Allow 24 hours for LTP Stone Oil to cure before finishing floor tiles with LTP Waxwash.

Renovating walls and floors sealed with a film forming surface tile sealer

Visit our blog for an explanation of the difference between surface and impregnating sealers.

This includes removing tile sealers such as LTP Ironwax SatinLTP Ironwax Gloss 
or LTP Glaze Protector or other polyurethane sealers and varnishes.

Renovating walls and floors sealed with an impregnating tile sealer

This includes removing tile sealers such as LTP MattstoneLTP Colour Intensifier & Stainblock or LTP MPG Sealer.

One last tip: Once you have renovated your floor clean and maintain it regularly with an appropriate maintenance product. This will make sure that the surface retains the desired look for longer and will extent the life of your surface seal. LTP offer two highly effective maintenance products in LTP Waxwash and LTP Floorshine.